Ok, you asked for it.
I'll try to break these up, otherwise this post will be atrociously long.
Flood stories from ancient peoples around the globe:
Scandinavian:
Oden, Vili, and Ve fought and slew the great ice giant Ymir, and icy water from his wounds drowned most of the Rime Giants. The giant Bergelmir escaped, with his wife and children, on a boat made from a hollowed tree trunk. From them rose the race of frost ogres. Ymir's body became the world we live on. His blood became the oceans.
Celtic:
Heaven and Earth were great giants, and Heaven lay upon the Earth so that their children were crowded between them, and the children and their mother were unhappy in the darkness. The boldest of the sons led his brothers in cutting up Heaven into many pieces. From his skull they made the firmament. His spilling blood caused a great flood which killed all humans except a single pair, who were saved in a ship made by a beneficent Titan. The waters settled in hollows to become the oceans. The son who led in the mutilation of Heaven was a Titan and became their king, but the Titans and gods hated each other, and the king titan was driven from his throne by his son, who was born a god. That Titan at last went to the land of the departed. The Titan who built the ship, whom some consider to be the same as the king Titan, went there also.
Sumerian:
The gods had decided to destroy mankind. The god Enlil warned the priest-king Ziusudra ("Long of Life") of the coming flood by speaking to a wall while Ziusudra listened at the side. He was instructed to build a great ship and carry beasts and birds upon it. Violent winds came, and a flood of rain covered the earth for seven days and nights. Then Ziusudra opened a window in the large boat, allowing sunlight to enter, and he prostrated himself before the sun-god Utu. After landing, he sacrificed a sheep and an ox and bowed before Anu and Enlil. For protecting the animals and the seed of mankind, he was granted eternal life and taken to the country of Dilmun, where the sun rises.
Chaldean:
The god Chronos in a vision warned Xisuthrus, the tenth king of Babylon, of a flood coming on the fifteenth day of the month of Daesius. The god ordered him to write a history and bury it in Sippara, and told him to build and provision a vessel (5 stadia by 2 stadia) for himself, his friends and relations, and all kinds of animals. Xisuthrus asked where he should sail, and Chronos answered, "to the gods, but first pray for all good things to men." Xisuthrus built a ship five furlongs by two furlongs and loaded it as ordered. After the flood had come and abated somewhat, he sent out some birds, which returned. Later, he tried again, and the birds returned with mud on their feet. On the third trial, the birds didn't return. He saw that land had appeared above the waters, so he parted some seams of his ship, saw the shore, and drove his ship aground in the Corcyraean mountains in Armenia. He disembarked with his wife, daughter, and pilot, and offered sacrifices to the gods. Those four were translated to live with the gods. The others at first were grieved when they could not find the four, but they heard Xisuthrus' voice in the air telling them to be pious and to seek his writings at Sippara. Part of the ship remains to this day, and some people make charms from its bitumen.